Smart playback for YouTube enhances the playback experience with custom intervals.
Image from store
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(2015-08-10, v:1.1.4) Gayle Spencer: Sales Hi , I'm sorry my english is a bit bad. : )
would like to purchase the following site and add-ons :
https://chrome.google.com/webstore/detail/smart-playback-for-youtub/bbblganleadjmielccojonlpmikoobeo/support
smartt.yt
Do you want to sell you ?
Concact : [email protected]